309426 has 16 divisors (see below), whose sum is σ = 666624. Its totient is φ = 95184.

The previous prime is 309403. The next prime is 309433. The reversal of 309426 is 624903.

It is a junction number, because it is equal to n+sod(n) for n = 309396 and 309405.

It is an unprimeable number.

309426 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1906 + ... + 2061.

It is an arithmetic number, because the mean of its divisors is an integer number (41664).

2³⁰⁹⁴²⁶ is an apocalyptic number.

309426 is an abundant number, since it is smaller than the sum of its proper divisors (357198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

309426 is a wasteful number, since it uses less digits than its factorization.

309426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3985.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 309426 is about 556.2607302336. The cubic root of 309426 is about 67.6371969463.

The spelling of 309426 in words is "three hundred nine thousand, four hundred twenty-six".